Production and physicochemical characterization of cassava leaf protein concentrate

Revista Brasileira de Engenharia Agrícola e Ambiental

Teo, Carla R. P. A.²  Coelho, Silvia R. M.³  Prudencio, Sandra H.⁴  Teo, Mauro S.¹ 

[1] Universidade Comunitária Regional de Chapecó, Chapecó;UNIOESTE, Cascavel;UEL, Londrina

关键词: hue angle;    color;    digital images;    food ingredient;    tannins    INTRODUÇÃO A produção brasileira de mandioca é de aproximadamente 26 milhões de toneladas (IBGE;    2007) e a parte aérea da planta apresenta alta produtividade;    com o terço superior alcançando rendimentos de até 5;    0 t ha-1;    contendo folhas de elevado teor protéico;    entre 21 e 30;    0% em base seca;    o que pode variar de acordo com o manejo da cultura (Carvalho et al;   

DOI  :  10.1590/S1415-43662010000900012

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The aim of this work was to compare cassava leaf protein concentrates produced by different methods and to propose procedures with large yield, protein content and recovery, small tannin content and light color. Protein concentrates were obtained by acid coagulation (pH = 5), acid thermo-coagulation (pH = 4 at 85 and 50 °C), 30% ethanol coagulation and thermo-coagulation (60 °C). Moisture, protein and tannin contents, and brightness and chromatic tonality were determined in protein concentrates and dried milled leaves. The concentrates with the largest yields, protein contents and the lightest colors (acid thermo-coagulation pH 4 and 50 °C and 30% ethanol coagulation) were modified and, after the concentrate obtained by ethanol coagulation, presented a 14.1% protein recovery, a 73.8 brightness and 99.8° chromatic tonality, not differing from the one produced by acid thermo-coagulation. The tannin content was 0.4% in both concentrates. The modified acid thermo-coagulation in pH 4 and 50 °C and 30% ethanol coagulation procedures are correct for cassava leaf protein concentrate production with large protein recovery and light color.

【 授权许可】

CC BY-NC